Thermal valve



P. G. MAcGREGOR.

THERMAL VALVE.

APPLICATION FILED DEC. 18, 19l8.

1,371,043. Patented Mar. 8, 1921.

NORRIS PETERS. INC LITNO WASHINGTON. D C

UNITED STATES PATENT OFFlQE.

PETER GRAHAM MAGGREGOR, OF NEW YORK, N. Y., ASSIGNOR T PYRENE MANUFAC- TURING COMPANY, A CORPORATION OF DELAWARE.

THERMAL VALVE.

Application filed December 18, 1918.

To (1!! w llom it may concern lie it known that 1, PETER G. lilaot'l'naoon, a citizen of the United States, and resident of the city, county, and State of New Ygrk, ha e invented certain new and useful i1nproveinents in Thermal Valves, of which the following is a specification.

This invention relates to a thermal release device adapted to release a desired part tor operation upon the occurrence of abnormal temperature conditions, being designed more particularly for use in connection with valves for automatic sprinkler systems although not necessarily limited to such use.

The invention has for an object to provide a novel and improved thermal release device oi simple construction and which will he characterized by quick operation upon undue rise oi? temperature in the surrounding air.

For further comprehension of the invention. and of the objects and advantage thereof, reference will be had to the followii description, taken in connection with the accompanying drawings, and to the nded claims in which the various novel Lures of the invention are more particularly set forth.

in the accompanying drawings illustrating a preferred embodiment of the invention- Figure l is an axial sectional view of my improved thermal release device showing it applied to close the discharge orifice of a spray nozzle.

Fig. 2 is a view, at right angles to Fig. .1. of the device alone, showing one half in elevation and the other half in axial section.

Fig. 8 is an end view of the device showing the end thereof which engages the nozzle.

Fig. 4 is a view of the opposite end of the device.

As here shown my improved thermal release device comprises a substantially cylindrical shell 1 having inturned annular flanges 2 and 3 at opposite ends, the inner face of flange 2 being screw threaded as at 4- whereby the shell may be screwed upon a nozzle 5 or other desired part.

The nozzle here shown has a substantially flat end face 6 having a shallow tapersided recesess 7 formed therein around the mouth of the discharge orifice 8. The

Specification of Letters Patent.

Patented Mar. 8, 1921.

Serial No. 267,290.

levers arranged in T-formation with theirhorizontal legs 13 and 1% resting at their ends on the flange 3 and their vertical legs 15 and 1.6 extending downwardly beside one.

another below the shell 1 and in the center line of the latter. The extreme ends of these vertical legs are secured together by a low fusing solder indicated at 17.

The horizontal legs 13 and 1 1- of the bell crank levers form a two-part abutment member between which and the disk 9 an expansile spring 18, coiled to semi-elliptical shape, bears, thusretaining the disk in position closing the discharge orifice of the nozzle. The disk constitutes a holding member to hold the nozzle closed.

The release-device may be assembled independently or the part to which it is to be applied, the disk 9, which is larger than the opening to receive the nozzle, being held by the spring 18 against the inturned flange 2 until the shell is screwed in place.

The arrangement of parts herev shown, with the fuse-connected lever ends projecting downwardly and under separating pressure from the spring 18, causes the connecting fuse to be broken by a minimum rise in temperature.

A will be apparent there is a pressure engagement between the spring and levers which causes the latter, when the fuse is broken, to be thrown downwardly and outwardly from the shell 1, the spring 18 and disk 9 dropping after them and opening the discharge orifice of the nozzle.

What I claim is 1. A thermal release device comprising an open-ended shell, a holding member loosely carried within the shell, the opening at one end of the shell being of smaller diameter than the said member, and the opening at the other end of said shell being of larger diameter than the said member, and a fuse controlled device freely supported within the shell and extending across the last mentioned opening and retaining the said member in position.

2. In a thermal release device, a holding member, a pair of hell crank levers arranged in T-formation, means providing a fulcrum for the outer ends of the horizontal legs of said levers, a fusible body securing the lower ends of the vertical legs together, and an expansible spring bearing between said horizontal legs and the said holding member.

3. A thermal release device comprising a substantially cylindrical shell having an in turned flange at one end, a holding member in said shell; a spring engaging said holding member, a two-part abutment member for said spring resting freely at opposite sides on said inturned flange, and a fusible body connecting the two parts of the abutment member together.

4. In combination with a nozzle, a shell fixed to said nozzle and projecting beyond the latter, said shell having its outer end open and provided with an inturned flange, a member closing the discharge orifice of the said nozzle, a pair of levers freely resting at one end upon the said inturned flange and having operative relation to said member to retain the latter in position, and a .fusible body holding said levers in position.

5. A thermal release device comprising a substantially cylindrical shell having inturned flanges providing reduced openings of differentsizes at opposite ends, a disk within said shell adapted to close the discharge orifice of the nozzle and being of lesser diameter than the larger of said openings, a pair of bell crank levers arranged in T-formation with their horizontal legs together forming a strip extending completely across the last mentioned opening and supported by the adjacent inturned flange, a fusible body securing the lower ends of the vertical legs of said levers together, and an expansile spring bearing between said strip and said disk.

6. In combination with a nozzle, a shell fixed to said nozzle and projectingbeyond the latter, said shell having its outer end open and provided with an inturned flange, a disk closing the discharge orifice of the said nozzle, a pair of hell crank levers fulcrumed upon the said inturned flange and having operative relation to said disk to retain the latter in position, and a fusible body engaging one leg of each of said levers to hold the latter in position.

7. In combination with a nozzle, a shell fixed to said nozzle and projecting beyond the latter, said shell having itsouter end open and provided with an inturned flange, a disk closing the discharge orifice of the said nozzle, said disk being of a diameter less than that of the opening in the end of the shell, a pair of levers fulcrumed upon the said inturned flange and having operative relation to said member to retain the latter in position, and a fusible body holding said levers in position.

Signed at the city, county and State of New York this 2 day of Dec., 1918.

PETER GRAHAM MAoGR-EGOR. 

